Specialist US Tax Support – Wherever You Are
USTAXFS is the largest boutique tax accounting firm in the UK and Europe specializing in US and US/UK tax. With offices in London, Zurich, and Geneva – and clients in over 30 countries – we’ve spent over 35 years helping individuals, funds, trusts, and corporations navigate US tax complexity with clarity and confidence.
We do this by investing in top talent and empowering our specialist teams of US tax accountants, dual US/UK tax professionals, and US attorneys to deliver the world-class service you can rely on.
Why Clients Choose USTAXFS
We provide clear guidance and hands-on support for Americans living in the UK and across Europe – from annual filings to long-term planning.
For our corporate and funds clients, our streamlined, end-to-end tax processes save you time, reduce complexity, and help you deliver better service to your investors and stakeholders.
- In Your Time Zone
Collaborate in real-time with our European-based US tax experts. No time zone delays.
- US/UK Tax Expertise
Our team understands how HMRC and the IRS treat your income, investments, pensions, property, and trusts – and how to manage obligations across both systems.
- Deep Fund & Corporate Expertise
We understand the European environment, AIFMs, and fund structures, from €50m to €15bn in AUM.
- Boutique Service, Cost-Effective Advice
We deliver expert support tailored to your situation – with the flexibility, responsiveness, and value that larger firms can’t always provide – at more attractive rates than the big corporates or US-based firms.
US-Connected Private Clients, Funds & Partnerships, Corporates
Private Clients, Trusts & Family Offices
- Tax planning & compliance
- Expatriation
- Advisory for trusts, estates & family offices
- Delinquent filings
- Real estate & pension reporting
Funds & Partnerships
- Structuring for US Investors
- 1065 / K-1s
- PFIC statements
- EINs & CTB elections
- Partnership Representative Services
Corporate Transactions & M&A
- US buyer/seller tax implications
- Tax due diligence
- Structuring subsidiaries
- PE & VC investor compliance
- Permanent Establishment risk
Boutique Approach, Backed by Global Reach
Our multilingual teams include US tax accountants, UK tax advisors, and US attorneys, all focused on delivering responsive, informed support. As members of the GGI Alliance, we’re proud to work alongside fellow firms, combining our US and UK tax expertise with your specialist knowledge to deliver seamless solutions to clients worldwide. By partnering together, we can extend each other’s reach, support cross-border needs more effectively, and create stronger outcomes for the businesses and individuals we serve.
How Can We Help?
Complete the form below to arrange your confidential, introductory call with one of our experts.